47971215 has 24 divisors (see below), whose sum is σ = 86767200. Its totient is φ = 24471744.

The previous prime is 47971213. The next prime is 47971223. The reversal of 47971215 is 51217974.

It is a happy number.

It is not a de Polignac number, because 47971215 - 2¹ = 47971213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47971215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47971211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22140 + ... + 24209.

It is an arithmetic number, because the mean of its divisors is an integer number (3615300).

Almost surely, 2^47971215 is an apocalyptic number.

47971215 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

47971215 is a deficient number, since it is larger than the sum of its proper divisors (38795985).

47971215 is a wasteful number, since it uses less digits than its factorization.

47971215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46383 (or 46380 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 47971215 is about 6926.1255403003. The cubic root of 47971215 is about 363.3514570727.

The spelling of 47971215 in words is "forty-seven million, nine hundred seventy-one thousand, two hundred fifteen".